Abstract: A non-resonant voltage converter includes an inductive element, a primary circuit including a first chopping switch and a first diode in parallel, a secondary circuit including a second chopping switch and a second diode in parallel, at least a smooth switching capacitor of one of said switches, which can form, with a spurious inductance of the inductive element, an oscillating circuit which generates a spurious current. The smooth switching capacitor of the converter is connected in parallel to the terminals of the inductive element, and forms with this element a loop having a reduced length in which is contained the spurious oscillating current.

Abstract: A composite switch is constituted by a series or parallel association of at least two simple switches. Each simple switch includes an element for measuring the current in the simple switch in the case of a parallel association; an element for measuring the voltage across the simple switch in the case of an association in series; and a control circuit receiving the information provided by the measuring elements as well as a control signal from the simple switch, and providing an active failure signal if the measured voltage is high or the measured current is low while the simple switch is controlled to be turned on, or if the measured current is high or the measured voltage is low while the simple switch is controlled to be turned off.